Alert archive / Maryland / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 149, NWS Wakefield, VA

July 8, 2017Somerset County, Maryland

NWS Wakefield, VA issued this severe thunderstorm warning at Jul 8, 2017, 6:13 PM EDT for Somerset County, Maryland. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 8, 2017, 6:13 PM EDT (22:13 UTC)
Expired
Jul 8, 2017, 7:00 PM EDT
In force
47 min
Issued by
NWS Wakefield, VA
Area
Storm-based polygon
Tornado
Possible
Hail
0.75 in
Wind
60.0 mph

County Somerset County, MD

The radar

The Dover AFB radar (KDOX), 90 km from the middle of the area, began a volume at 22:17 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Roanoke, VA (KRNK), launched 12:00Z, 10.2 hours before the alert went out and 336 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2017-07-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2017-07-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1227 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The office that day

Everything else NWS Wakefield, VA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 8, 5:10 PM EDTSpecial Weather StatementAKQLunenburg, Mecklenburg50 min
Jul 8, 5:14 PM EDTSpecial Weather StatementAKQWestmoreland46 min
Jul 8, 6:00 PM EDTSpecial Weather StatementAKQMecklenburg30 min
Jul 8, 6:14 PM EDTSpecial Weather StatementAKQRichmond46 min
Jul 8, 6:27 PM EDTSpecial Weather StatementAKQMecklenburg48 min
Jul 8, 6:56 PM EDTSpecial Weather StatementAKQMecklenburg49 min
Jul 8, 7:12 PM EDTSpecial Weather StatementAKQBrunswick33 min
Jul 8, 7:22 PM EDTSpecial Marine WarningAKQ53 min
Jul 8, 7:24 PM EDTSevere Thunderstorm WarningAKQAccomack36 min
Jul 8, 7:31 PM EDTSpecial Weather StatementAKQHertford59 min
Jul 7, 9:52 PM EDTSpecial Weather StatementAKQDorchester53 min
Jul 8, 5:46 PM EDTSpecial Weather StatementAKQSomerset44 min
Jul 8, 7:02 PM EDTSpecial Weather StatementAKQWorcester28 min

Nearby

Severe Thunderstorm Warnings in Maryland, 2017Every severe thunderstorm warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.